I don't know too much about the F/A's, but I'd love to get one sometime. I think I remember reading that you should use ATF(auto transmission fluid) for the shock fluid. If it's cycling faste than a SMG then there's something wrong with the shocks, probably just no oil. I remember playing against someone using a F/A the first time I played at a real field, he could adjust the ROF between about 5-15bps. I would think any oil/lube would be fine on the spring, something thicker like pure lube or dow33 would probably be best. Hopefully someone that has actually used one of these guns will chime in with some answers.